Diffuser with a detachable deflector member



May 7, 1957 H. DANINHIRSCH 2,791,159

DiFF'USER WITH A DETACHABLE DEFLECTOR MEMBER I Filed Nov. 25, 1955- RM Y ow E

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Al N United States Patent Oflice 2,791,169 Patented May 7, 1957 Ha ry Dani h t h, D bt t Con ass s an to C tact Engineering CorporatiomDanbury, Conn a corpora! tion of New York Application November 23, 1953, Serial No. 393,887

7 Claims. (Cl, 98,-,40).

ih s in ehtlsn t s es ts si s to n ilating or he co i ionin e ees and: p lly o. a selling ei tuser ors p y i r e seems a d. othe he esut s. It is object of the invention to provide an outlet of this chares et t d d. ith e d flest sthe hh t t seeure l n p a as to permit of its ready removal tor cleansing or for any other purpose.

t is a o her Object of he i ven ion o. pro de mean by which the deflector member can be applied over an outlet in a manner to enable it to be securely, yet re; mevably et in n. Pla e, n i hou he use scr ws, belts or t er ep rab fas nin ements ke y o ecome lost during the removal or replacement of the deflecr tor member.

It is still another O j ct of the invention to provide, a deflector member for placement over an ai-r outlet, h c v membe will be ma ined i pla e by pl ne eleeet or spr l ps ndhich. re a r nge o e gage d ma nt n e fleet r m m e in, any o e. f. a number of positions to. thereby enable an outlet orifice with wh ch he deflec o membe s P de o. be lo a ed according to the desired directional flow of air from the outlet.

A still further object of the invention is t Provide an air outlet with a defletcor member that is removable, and replaceable without the use, of tools, thereby promoting periodic removal of the deflector member and cleansing f. the u l nd. ter or he defl ctor. memb With these and other objects to be hereinaiter set forth in view, I have devised the arrangement of parts to be described d m re pa ticula y p i etl u n he ms appended hereto.

In the accompanying drawing, wherein an illustrative embodiment of the invention is, disclosed,

Fig. l is a vertical sectional View through the air outlet and deflector member in the form of an inclosing hood, showing a portion, of the hood, at the; left of the Figure, broken ofi;

Fig. 1a is a vertical. sectional view through the brokenoff part of the hood;

Fig. 2 is a sectional view, taken substantially on the line 2,'--2, of Fig. 1, looking in the direction of the arrows;

Fig. 3 is a sectional view, taken substantially on the line 33 of Fig. 1, looking in the direotiql of the arrows;

Fig. 4 is a sectional view, taken substantially on the line 4-4 of Fig. 1, looking in the directionof the arrows; and

Fig. 5 is a view similar to Fig. 4, but taken on the line 5-5 of Fig. 1, looking. in the direction oi the arrows and showing the hood in; engagementwith the retaining clip.

Re e n to h aw n p rtic arly o i e eof, 1 ndi te n n ulus, me, m m e plate. adapted to be secured to the outlet of an air supply. duct by suitable fastening elements, such as, screws extended through the radial flange 2. of the ring member. The flange 2 is formed with a depressed annular channel or seat. 3. hi eives a soft. and omp essib e. sher or.

gasket 4, composed, of sponge. rubber or some material of subs ant a y s m ar haracteristics. A downwar lyextend annular flang 5 surrounds. the cen r l outle opening 6 in the ring member or plate 1,, and. secured on an xte d wnwardly fr m the fla g 5 is a u e forested sl or cy inde The slee e or cy inder. 7 is perforated for its entire area. and is thus of a foraminous n tu e. so tha e air may flow through it.

he. ho 8 for he outlet is of up-sh p d tr stweohi l form io a ha a closed b ttom 9 and, side Wall .0,, he ide w l an ttom ingimp torat excep for a slot-like a r ut v o ifice 1,1, s r un by n. edg n QE tr m 12 f. a p i ma erial su h, a e y yrene or other su a e m eri ln, the. interi r of h h o nd main ai n h o tom 9 thereof;, i s ndrreducing. ma e ie s c as fi re ass 13- Provided at the. op. of;

he oo 8 enehnular sure ring 14., whi h is provid d at its per p eral dg wi a ownturne flange 15 fitting 0 h top e ge of th ide wall 10- f. th ho d. nd at a hin the c os re r ng o h hood- The closureri g 14; is formed wi h. a ep esse ann lar.- ea 16. on wh e s p q e e h t o g sk t 17 composed of felt. or similar material. When the hood. 8 is fitted, in. Place, as is seen at the right in Fig. 1, it will be noted that; the sh r or g sk 17 i in e pos w en heupper face of the, closure ring 14 and, the under surface of the plate. 1. At, the same time, the raised inner flange 18 on the cl s e r ng 1 s. un er he P r 1 o h ing m mberhus centra yp sitioning he hood 8 with. e p t to the: ring member 1.

et e lly tegule ehl ith n the p r orated sleeve or cylinder 7 is a disk-shaped damper 29', provided; on p r phery w th a washer r s a ing mem er 21'. hich n he of. pla m er l s ch s po y yr n or: he like, and which establishes a close but, sliding contact; with he inne rfa f h slee o ylind r C n r l y positioned in the damper 2 0 and held against axial movement relatively thereto, is a rotatable, internally-threaded hub member 22 threadable. 0 the; adjusting spindle 23 rotatably secured in the bottom 9 of the hood 8. It will be noted that, the bottom of the hood is confined between the head 24a and disk 25 of the spindle 23 so that while,

the spindle 23 can berotated Within the hood by engage mentof a suitable toolwith a slot in the head 24%. the spindle will not become detached from the hood. As; the spindle, is rotated, it will beclear that the threadable connection between it and the hub 22, rotatively attached. to. the damper 20, will cause, the damper to be, raised. or lowered as required to thereby regulate the flow of the air through the perforated cylinder or sleeve 7. The crosspin 36 in the spindle23 prevents inadvertent separation of the, spindle from the hub 22.

Secured adjacent to the inner'endof the ring member- 14.is an arcuate perforated; plate 24 so that this plate is, carried by and is removable with the hood when-tbehood is detached from the ring member 1 in the manner to be. now described. It will, be noted that the perforated plate 24. is located in registry with the, outlet orifice 1.1.. Whenthe hood is fitted in place on the plate 1, the perforated plate 24 is interposed between the air orifice 11, andthesleeve 7 as. seen at the right in Fig. l.

The means for securing the hood 8 in position with respect to the ring member 1, and as shown attire-rightv in; Fig 1, consists of a plurality of spring, members or clips. 35 secured tov the ring member Il in, the manner shown inFigs. 4and 5. Itwillbe therein noted that each. clip includes a resilient, arched fingerv 26 having. an into gral, vertical leg portion 27, which extends upwardly throughaslotZS in the ring member 1. The clip is. also formed with an integnal tab. portion. his isguste atly ag nst heupper face o he r ng. m er or plate 1 andlis secured theretoby. a single: rivet 3,0 or equivalent.

I 3 fastening element. A single fastening element is all that is required to thus attach each clip in position, s1nce the leg portion 27, fitting through the complementary slot 28,

prevents rotation or swiveling movement of the clip;

Provided in the closure ring 14 is a plurality of spaced slot-like apertures 31. Each of these apertures is of a size to permit the finger portion 26 of any one of the clips to be inserted through it. As shown in Fig. 4, the hood is lifted vertically, with four of the apertures 31 registered with the four clips 35, and the fingers 26 of the clips are then inserted through the apertures 31. The hood 8 is then given a slight rotative movement and the fingers 26 will engage beneath the closure ring 14 to thereby hold the hood securely attached to the ring member 1 over the duct outlet. When the hood is rotated in the manner described, it will be noted that the vertical leg portion 27 of each of the clips 35 will act as a stop to thereby limit the rotative movement of the hood and also indicate that the hood has reached its position of firm attachment to the ring member 1. It is to be observed that since the fastening tab 29 of each of the clips 35 is disposed on the top side of the ring member 1, it will not be reached orcontacted by the ring member 14 when the hood is being attached, and thus the possibility of the clips becoming pried oif or loosened by repeated placement of the hood in position, will be avoided.

As will be seen in Fig. 2, the closure ring 14 of the hood isformed with eight of the apertures 31, While four clips 35 are provided. This arrangement is such that it enables the user of the device to place the hood in various positions on the plate 1 to thereby extend the outlet orifice 11 in any desired direction and thus direct the air flow accordingly. By selection of the required apertures 31 for engagement with the clips, the directionalcontrol of the air flow will be had.

From the foregoing, the operation of the described structure will be readily understood. In placing the hood in position, it is raised until the fingers 26 of the four clips extend through the required four apertures 31, whereupon the hood is rotated slightly until the fingers 26 engage under the parts of the ring member 1 adjacent to the apertures, in the manner shown in Fig. 5. The spring clips, thus engaging the hood, will not only firmly hold it in position, but avoid the possibility of rattle and noise. This is of great importance as many of the outlet devices or diffusers to which this invention is applicable have been designed to operate at relatively high dischargovelocities ranging between 3000 'F. P. M. to 8000 F. P. M. At these high velocities the deflector member tends to chatter, which not only generates an objectionable noise, but the vibration also causes undue wear upon the parts. The spring clips according to this invention serve to cushion the deflector member against the outlet plate and thus tend to counteract any possible chattering action of the deflector member. While the hood is in place the damper 20 can be easily regulated by rotative movement of the spindle 22. The removal of the hood for cleaning of it as Well as the other parts of the outlet is had by merely twisting the hood slightly to enable the clips to be passed through the apertures 31 and the hood then lowered. Since a substantial number of the apertures 31 are provided in the closure ring 14, it will be apparent that any desired four of them may be our ployed for engagement with the clips and thus the outlet orifice 11 can be disposed for the emission of air in any required direction.

Having described one embodiment of the invention, it is obvious that the same is not to be restricted thereto, but is broad enough to cover all structures coming within the scope of the annexed claims.

What I claim is:

1. In a device of the character described, an annular plate for attachment to the outlet of an air duct, a perforated sleeve attached centrally of the plate and forming an air passage projecting from the plate, a cup-shaped hood fitted over the sleeve, a damper carried by the hood and adjustable up and down within the sleeve, the hood having a side wall formed with an air orifice, an arcuate perforated plate disposed within the hood and interposed between the air orifice and the perforated sleeve, said arcuate perforated plate being carried by and removable with the hood, the hood having an annular top flange supporting the perforated plate, said top flange being provided with a plurality of apertures arranged in a circle, and the annular plate having spring clips arranged in a circle and extending through said apertures and engaging against the under side of the top flange of the hood.

2. In a device of the character provided for in claim 1 wherein the apertures in the top of the hood are greater in number than the number of spring clips to permit the hood to be positioned in a manner to enable the air orifice to face in any one of a number of directions, said clips being caused to engage with or become disengaged from the annular plate by rotative movement of the hood relative thereto.

3. In a device of the character described, an annular plate attached to the outlet of an air duct, a hood fitted thereover and having an apertured top, and means for detachably connecting the hood to the plate comprising a series of spring clips fastened on the plate and circularly arranged and extending through the apertures in the top fiange of the hood and engaging against a face of the top of the hood adjacent to said apertures by rotative movement of the hood about a vertical axis.

4. In a device of the character provided for in claim 3, wherein each clip consists of a resilient finger portion engaging against a face of the top flange of the hood, an integral leg portion extending through a slot in the annular plate, and a tab portion disposed on the upper face of the plate and attached to said plate, the le portion of the clip constituting an abutment to limit rotation of the hood when the hood is being placed in engagement with the clips.

5. In a device of the character described, an annular plate attached to the outlet of an air duct, a perforated sleeve attached to said annular plate and forming a tubu lar perforated air passage, a hood for fitment around the sleeve, said hood having a side wall provided with an air outlet, spaced spring clips provided on the annular plate, the hood being provided at one end with an annular flange for facial contact with the annular plate, the flange being provided with openings corresponding at least to the number of spring clips and shaped to permit the passage of the spring clips through them, the clips and openings therefor being circularly arranged, the clips being each provided with a finger portion taking under parts of the flange to thereby attach the hood to the flanged plate when the clips are inserted through the openings in the flange and the hood is rotatively moved about its axis.

6.'ln a device of the character described, an annular plate attached to the outlet of an air duct, a perforated cylindrical sleeve attached to and depending from the annular plate and forming an air passage leading from the duct outlet, a cup-shaped hood for fitment over the annular plate and around the sleeve, a damper carried by the hood and adjustable within the sleeve, the hood having a side wall provided with an outlet opening, an arcnatc perforated plate located Within the hoodand interposed between the perforated sleeve and outlet opening, the

annular plate being provided with a plurality of spring clips arranged in a circle, each clip having a finger extending along the under side of the annular plate, the hood having a flange formed with a plurality of slots conforming at least in number to the clips and through which the fingers of the clips can be extended to take under the flange on rotative movement of the hood about a vertical axis, to thereby attach the hood to the annular plate.

7. In a device of the character described, a plate attached to the outlet of an air duct, a hood for attachment to the plate, said plate having a plurality of circularlyarranged spring clips having fingers exposed on the face of the plate, the hood having an upper flange for facial disposition against the plate, said flange being provided With apertures arranged circularly for registry with the fingers of the clips and adapted to engage therewith by placement of the flange against the plate and rotatively moving the hood, the hood having a side air outlet, the apertures in the flange of the hood being greater in number than the clips so that a selected number of said apertures can be used to engage with the clips to thus position the air outlet in any one of a number of selected positions.

References Cited in the file of this patent UNITED STATES PATENTS 1,274,996 Davis Aug. 6, 1918 2,603,141 Phillips et al. July 15, 1952 2,607,282 Gilbert Aug. 19, 1952 2,627,799 Kurth et a1 Feb. 10, 1953 2,644,389 Dauphinee July 7, 1953 

